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1.引言在光频波段利用相干电磁波的光通讯或光信息处理的装置中,研究其传输线路是有重要意义的。目前,光传输线路大致分为介质线路和波束波导线路两种。在传输特性稳定以及构造实用化的条件下,介质线路的传输损耗为1分贝/米的数量级,而波束波导线路的传输损耗则为1分贝/公里。由此可见,介质线路适合作增音机等装置内的传输线路,但不宜作远程传
1. Introduction In the optical frequency band using coherent electromagnetic wave optical communications or optical information processing device, the study of the transmission line is of great significance. At present, optical transmission lines are broadly divided into two types: dielectric lines and beam waveguide lines. The transmission loss of the dielectric line is on the order of 1 dB / m while the transmission characteristics are stable and the structure is practical, whereas the transmission loss of the beam guide line is 1 dB / km. Thus, the media line is suitable as a transmission line within a device such as a booster, but not suitable for remote transmission